当前位置: X-MOL 学术Inorg. Chem. Front. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A flexible three-dimensional composite nanofiber enhanced quasi-solid electrolyte for high-performance lithium metal batteries
Inorganic Chemistry Frontiers ( IF 7 ) Pub Date : 2020-11-03 , DOI: 10.1039/d0qi01159b
Shuyuan Li 1, 2, 3, 4, 5 , Nianwu Li 5, 6, 7, 8, 9 , Chunwen Sun 1, 2, 3, 4, 5
Affiliation  

Solid-state lithium-ion batteries have attracted great attention in recent years due to their remarkable safety and high energy density. However, the ionic conductivities of most solid-state electrolytes (SSE) are still not high enough for practical applications. Herein, we report a high-performance quasi-solid-state electrolyte composed of an electrospinning LATP-PVDF-HFP nanofiber matrix and an in situ formed gel. The prepared quasi-solid gel electrolyte shows a 3D porous network with significantly improved ionic conductivity up to 3.394 mS cm−1. Meanwhile, the quasi-solid-state electrolyte exhibits a wider electrochemical window than the gel electrolyte, due to the synergistic effect between the 3D network fiber and in situ formed gel. The Li|CGE|LiFePO4 battery with this quasi-solid gel electrolyte shows good rate capability and cycling stability, and the discharge capacity of the cell is 146.6 mA h g−1 at 2C. The capacity retention can still reach 97% after 300 cycles at 0.5C. This work provides a promising strategy for designing high-performance lithium metal batteries.

中文翻译:

用于高性能锂金属电池的柔性三维复合纳米纤维增强准固体电解质

固态锂离子电池由于其卓越的安全性和高能量密度,近年来引起了极大的关注。但是,大多数固态电解质(SSE)的离子电导率仍不足以用于实际应用。本文中,我们报告了一种高性能的准固态电解质,该电解质由电纺LATP-PVDF-HFP纳米纤维基质和原位形成的凝胶组成。制备的准固体凝胶电解质显示出具有高达3.394 mS cm -1的离子电导率的显着改善的3D多孔网络。同时,由于3D网络纤维与原位形成的凝胶之间的协同作用,准固态电解质比凝胶电解质具有更宽的电化学窗口。Li | CGE | LiFePO带有这种准固体凝胶电解质的4电池显示出良好的倍率能力和循环稳定性,并且在2C时电池的放电容量为146.6 mA hg -1。在0.5C下300次循环后,容量保持率仍可达到97%。这项工作为设计高性能锂金属电池提供了有希望的策略。
更新日期:2020-11-16
down
wechat
bug